# CloudWatch Metrics for Bias Drift Analysis
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**Note**  
Amazon SageMaker Model Monitor is no longer open to new customers. Existing customers can continue to use the service as normal. Amazon continues to invest in security and availability improvements for Model Monitor, but we do not plan to introduce new features. For more information, see [Amazon SageMaker Model Monitor availability change](model-monitor-availability-change.md). 

This guide shows CloudWatch metrics and their properties that you can use for bias drift analysis in SageMaker Clarify. Bias drift monitoring jobs compute both [pre-training bias metrics](https://docs.amazonaws.cn/sagemaker/latest/dg/clarify-measure-data-bias.html) and [post-training bias metrics](https://docs.amazonaws.cn/sagemaker/latest/dg/clarify-measure-post-training-bias.html), and publish them to the following CloudWatch namespace:
+ For real-time endpoints: `aws/sagemaker/Endpoints/bias-metrics`
+ For batch transform jobs: `aws/sagemaker/ModelMonitoring/bias-metrics` 

The CloudWatch metric name appends the metric's short name to `bias_metric`.

For example, `bias_metric_CI` is the bias metric for class imbalance (CI).

**Note**  
`+/- infinity` is published as the floating point number `+/- 2.348543e108`, and errors including null values are not published.

Each metric has the following properties:
+ `Endpoint`: The name of the monitored endpoint, if applicable.
+ `MonitoringSchedule`The name of the schedule for the monitoring job. 
+ `BiasStage`: The name of the stage of the bias drift monitoring job. Choose either `Pre-training` or `Post-Training`.
+ `Label`: The name of the target feature, provided by the monitoring job analysis configuration `label`.
+ `LabelValue`: The value of the target feature, provided by the monitoring job analysis configuration `label_values_or_threshold`.
+ `Facet`: The name of the facet, provided by the monitoring job analysis configuration facet `name_of_index`.
+ `FacetValue`: The value of the facet, provided by the monitoring job analysis configuration facet `nvalue_or_threshold`.

To stop the monitoring jobs from publishing metrics, set `publish_cloudwatch_metrics` to `Disabled` in the `Environment` map of [model bias job](https://docs.amazonaws.cn/sagemaker/latest/APIReference/API_CreateModelBiasJobDefinition.html) definition.